Select the option that is related to the fifth alphanumeric-cluster in the same way as the second alphanumeric-cluster is related to the first alphanumeric-cluster and the fourth alphanumeric-cluster is related to the third alphanumeric-cluster.
MNO13 : QRS17 :: PQR16 : TUV20 :: STU19 : ?
MNO13 : QRS17
MNO13 ==>Â (M+4) (N+4) (O+4) (13+4) ==> QRS17
PQR16 : TUV20
PQR16Â ==>Â (P+4) (Q+4) (R+4) (16+4)Â ==> TUV20
STU19 : ?
STU19Â ==> (S+4) (T+4) (U+4) (19+4) ==> WXY23
So 'WXY23' will come in place of the question mark.
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